Rothwell, Figg, Ernst and Manbeck, PC.

   Home   Contact Us   Site Map   Print


Firm ProfileAttorneysPractice AreasRepresentative CasesNewsCareersLinks and Resources


  • Litigation
  • Inter Partes Review, Reexamination, and Interference Practice
  • Counseling
  • Patent Prosecution


  • B.S., Chemical Engineering, Bucknell University
    - Varsity Men's Lacrosse
  • M.S., Biotechnology, Johns Hopkins University
  • J.D., Georgetown University Law Center, magna cum laude, Order of the Coif
    - Top 3% of graduating class
    - Dean's List
    - CALI Excellence for the Future Award: Constitutional Law I: The Federal System



  • Giles S. Rich Inn of Court


  • District of Columbia
  • Commonwealth of Virginia


Mr. Dahlgrenís practice encompasses all aspects of patent law including patent litigation, patent prosecution, opinions and counseling. Mr. Dahlgren has litigated a variety of patent matters in district courts throughout the country, ranging from Hatch-Waxman cases involving pharmaceuticals to cases involving smartphones and mobile Internet technology. He has experience in pre-litigation counseling, motions practice, Markman and efficiently managing discovery. Mr. Dahlgren also has substantial experience with ex parte reexaminations and contested matters before the USPTO, including interferences and post-grant proceedings before the Patent Trial and Appeal Board.

Additionally, Mr. Dahlgren has experience in drafting and prosecuting patent applications before the USPTO, and in overseeing the prosecution of foreign counterpart applications. His expertise also extends to opinion and counseling work, which includes preparing freedom to operate/clearance opinions, as well as counseling as to the scope, validity and enforceability of rights of existing patents.

Mr. Dahlgrenís practice covers a broad range of diverse technologies. He has worked on matters involving pharmaceuticals, material science, medical devices, petrochemical and industrial systems, laboratory and diagnostic equipment, dietary supplements, batteries, exhaust gas aftertreatment systems, insulation, and business methods. Mr. Dahlgren also has experience with computer software and Internet technologies such as those relating to firewalls, e-commerce platforms, Internet search methodologies, financial and investment systems, content management systems, and social networks.

Mr. Dahlgren first joined Rothwell Figg as a law clerk and worked full-time while attending the Georgetown University Law Center. Mr. Dahlgren later joined Rothwell Figg as an associate after graduating magna cum laude from Georgetown where his achievements placed him in the top 3% of his graduating class. Mr. Dahlgren left the firm from 2013-2014 to serve as a law clerk to then-Chief Judge Randall R. Rader at the United States Court of Appeals for the Federal Circuit.

Mr. Dahlgren graduated from Bucknell University with a degree in Chemical Engineering. While an undergraduate, he participated on the Varsity Menís Lacrosse team, which won consecutive Patriot League Championships while he was there. After graduation, Mr. Dahlgren worked in the defense industry as an engineer responsible for developing a variety of chemical and biological detection systems. During that time, he also earned an M.S. in Biotechnology from Johns Hopkins University.

Mr. Dahlgren is a member of the Giles S. Rich American Inn of Court in Washington, DC, which is dedicated to fostering professionalism, ethics, civility, and legal skills in the area of intellectual property. Mr. Dahlgren is also a member of the District of Columbia Bar and Virginia State Bar.

Representative Cases

  • Versata Development Group, Inc. v. Rea
  • Sunovion Pharmaceuticals, Inc. v. Actavis, Inc.
  • Novartis Pharmaceuticals Corp. et al. v. Watson Laboratories, Inc. et al.
  • Cyberfone Systems, LLC v. CNN Interactive Group, Inc.
  • Sanofi-Aventis U.S. LLC v. Fresenius Kabi Oncology plc†††††††
  • Cirrex Systems LLC v. InfraReDx, Inc.
  • Sigris Research Inc. v. bioMerieux SA et al.
  • Armacell Enterprises, GmbH et al. v. K-Flex USA, LLC et al.
  • Wireless Ink Corp. v. Facebook et al. (represented MySpace, Inc.)†
  • Call, Inc. v. Advanced Health Media LLC
  • Dow Jones & Company, Inc. v. Ablaise, Ltd.
  • Valeant Pharmaceuticals International v. Spear Pharmaceuticals, Inc.
  • ProteoTech, Inc. v. Unicity International Inc. et al. (represented Rexall Sundown, Inc.)

Representative Reexaminations

  • Reexamination No. 90/010,849
  • Reexamination No. 90/011,010
  • Reexamination No. 90/011,012
  • Reexamination No. 90/011,014
  • Reexamination No. 95/000,489
  • Reexamination No. 95/001,519
  • Reexamination No. 95/001,520

Email Attorney

Print Bio

Download Full Bio

Download V-Card

607 14th Street, N.W. Suite 800 Washington, D.C. 20005 (202) 783-6040 Fax: (202) 783-6031607 14th Street, N.W. Suite 800 Washington, D.C. 20005 (202) 783-6040 Fax: (202) 783-6031
© Copyright 2000-2015 Rothwell, Figg, Ernst & Manbeck, P.C. |  All Rights Reserved | Disclaimer | Privacy Policy